Closed computer host dust removal device and method

Abstract

The invention discloses a closed computer host dust removal device which comprises a dust removal operation box, an air pump, an air injection unit and a dust suction assembly, the dust removal operation box is closed and provided with a box door, the output end of the air pump is communicated with the air injection unit, the dust suction assembly is communicated with the dust removal operation box, and a rotating disc and a motor I are arranged in the dust removal operation box; the motor I drives the rotating disc to rotate. The air injection unit comprises a lifting assembly, a sliding block and a plurality of air nozzles. The sliding block is connected with the lifting end of the lifting assembly, and the sliding block is transversely arranged and provided with a ventilation channel. The air taps are communicated with the ventilation channel and are uniformly arranged along the extension direction of the sliding block; and the ventilation channel is communicated with the air pump through a hose. By arranging a plurality of air nozzles which are transversely arranged, covering type dust removal can be specifically carried out on the computer host, especially the side plate dismounting surface, and the phenomenon that dust removal dead corners cannot be effectively removed due to the fact that other side surfaces are not dismounted is avoided.

Description

Technical Field

[0001] This invention relates to the field of computer host dust removal equipment technology, specifically to a closed computer host dust removal device and method. Background Technology

[0003] With the widespread use and improved performance of computer equipment, dust easily accumulates inside computer mainframes during long-term operation, leading to decreased heat dissipation efficiency, reduced hardware lifespan, and even short-circuit failures. Traditional dust removal methods often employ open-type operations, such as air pump blowing, brush cleaning, or vacuum cleaners directly adsorbing dust, but all have significant drawbacks. For example, during open-type dust removal, dust easily spreads into the working environment, polluting the air and potentially being inhaled by operators, possibly causing respiratory illnesses. Furthermore, the scattered dust may re-adhere to the inside of the mainframe or the surface of other equipment, creating a vicious cycle of "dust removal-re-contamination." Ordinary vacuum cleaners or air pumps are insufficient to thoroughly remove dust from delicate electronic components (such as heat sinks and circuit board gaps), and their operating angle is limited, resulting in poor cleaning of hard-to-reach areas. Most existing dust removal equipment on the market is of a general-purpose design, lacking adaptability to the internal structure of computer mainframes.

[0004] The invention patent with publication number CN110877037A discloses a closed computer host dust removal device, which uses a rotating spraying device for dust removal. It is simple to operate and significantly improves dust removal efficiency. However, the nozzles of this device are all arranged vertically. When cleaning the computer host, usually only one side panel is removed to expose its internal space. With a row of vertically arranged nozzles, rotating the computer host or its spraying device will create dust removal dead corners because the other sides of the computer host are not removed, making it difficult to effectively remove dust. Summary of the Invention

[0006] One object of the present invention is to solve at least the above-mentioned problems and / or defects, and to provide at least the advantages described below.

[0007] To achieve these objectives and other advantages of the present invention, a closed-type computer host dust removal device is provided, comprising: a dust removal operation box, an air pump, an air jet unit, and a dust collection assembly. The dust removal operation box is closed and has a door. The output end of the air pump is connected to the air jet unit. The dust collection assembly is connected to the dust removal operation box. A rotating disk and a motor I are provided inside the dust removal operation box. The motor I drives the rotating disk to rotate. The air jet unit includes: a lifting assembly, a slider, and multiple air nozzles. The lifting assembly is fixed inside the dust removal operation box; The slider is connected to the lifting end of the lifting assembly, and the slider is arranged horizontally and has a ventilation passage. The air nozzles are connected to the ventilation passage and are evenly distributed along the extension direction of the slider. The ventilation passage is connected to the air pump via a hose.

[0008] This invention, by setting up multiple horizontally arranged air nozzles, can specifically cover and clean the computer host, especially the side panel removal surface, avoiding the problem of dust dead corners when other sides are not removed, which would lead to ineffective dust removal.

[0009] Preferably, a hollow plate is provided between the rotary disk and the bottom plate of the dust removal operation box; The hollow plate has multiple air intake holes on the top and connecting holes on the side. The connecting hole is connected to the suction end of the dust collection component.

[0010] Preferably, the lifting assembly includes: a motor II, a lead screw, a lifting block, a spiral bar, and a dial. The lead screw is connected to the power output end of motor II; The lifting block is connected to the lead screw drive; The spiral bar is arranged parallel to the lead screw; The center of the dial is provided with a special-shaped hole that matches the spiral strip, so that the dial and the spiral strip are rotatably connected. The actuating disc is rotatably fixed to the lifting block, and at least one actuating tooth is provided on its outer side; The surface of the lifting block that mates with the slider is provided with a dovetail groove along its extension direction, and the slider is provided with a protrusion that matches the dovetail groove, so that the lifting block and the slider can slide relative to each other; The slider is provided with a paving groove to avoid the paving teeth, and the center of the paving groove is provided with a stop block that matches the paving teeth, so that the slider slides to the paving side under the paving of the paving teeth. One end of the lifting block is equipped with a spring connected to the slider, so that the slider returns to the position before the prying teeth were moved.

[0011] Preferably, the dust collection assembly includes: a fan and a dust collection bin; The dust collection bin is connected to the air intake end of the fan and the dust removal operation box; A removable filter element is provided at the connection point between the top of the dust collection chamber and the fan; The dust collection chamber is equipped with a dust removal drawer at the bottom.

[0012] Preferably, it also includes: a controller; The controller is communicatively connected to the air pump, the dust collection assembly, the lifting assembly, and motor I; The dust removal control box is equipped with a PM10 sensor that communicates with the controller.

[0013] A method for dust removal from a sealed computer host includes: Step 1: Open the dust removal control box, fix the computer host to be dusted onto the rotating disk clamping block assembly, and make the side of the computer host with the side panel removed face the jet unit. Close the dust removal control box and start the air pump and dust collection assembly. Step 2: The lifting assembly drives the horizontally arranged air nozzles to perform one up-and-down reciprocating motion; Step 3: Rotate the rotating disk sequentially by a predetermined angle in a fixed direction, and repeat Step 2 after each rotation until the rotating disk returns to its initial position; Step 4: The controller reads the PM10 sensor detection data; Step 5: When the PM10 index remains below the set value for a predetermined period of time, the device stops operating, completing this dust removal operation; otherwise, repeat steps 2-5.

[0014] Preferably, in step 3, the rotating disk rotates at angles of 45°, 45°, 90°, 90°, 45°, and 45° in sequence.

[0015] Preferably, the predetermined time for reading the PM10 index in step 5 is 8 seconds.

[0016] Preferably, the PM10 index is set to 200 μg / m³ in step 5. 3 .

[0017] The present invention has at least the following beneficial effects: by setting multiple horizontally arranged air nozzles and driving them to rise and fall with the lifting component, targeted dust removal can be carried out on the computer host, especially the side panel removal surface, avoiding the phenomenon that dust removal dead corners cannot be effectively removed due to other sides not being removed; by setting a dust removal operation box and a dust collection component, the dust is prevented from easily spreading and polluting the air, and the dust in the dust removal operation box is cleaned in time to prevent secondary adhesion to the computer host, further ensuring the dust removal effect.

[0018] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the opening door of the enclosed computer host dust removal device in one embodiment of the present invention; Figure 2 This is a schematic diagram of the closed door structure of a dust removal device for a closed computer host in one embodiment of the present invention; Figure 3 This is a cross-sectional view of a closed computer host dust removal device in one embodiment of the present invention; Figure 4This is a schematic diagram of the air jet unit of the enclosed computer host dust removal device in one embodiment of the present invention; Figure 5 This is a partial structural schematic diagram of the air jet unit of the enclosed computer host dust removal device in one embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the card block assembly of the enclosed computer host dust removal device in one embodiment of the present invention.

[0021] Drawing markings: 1. Dust removal control box; 11. Rotary disc; 111. Locking block assembly; 1111. Fixed block; 1112. Moving block I; 1113. Moving block II; 1114. Screw; 12. Orifice plate; 13. Box door; 131. Observation window; 14. Soundproof cover; 2. Air pump; 3. Jet unit; 31. Lifting assembly; 311. Bracket; 312. Motor II; 313. Lead screw; 3 14. Guide rod; 315. Spiral strip; 316. Lifting block; 3161. Actuating groove; 3162. Stop block; 317. Actuating disc; 3171. Actuating tooth; 318. Spring; 32. Slider; 33. Air nozzle; 4. Dust collection assembly; 41. Fan; 42. Dust collection bin; 421. Filter element; 5. Controller; 51. Control button; 6. Integrated chassis; 61. Dust removal port; 62. Handle. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0024] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not list the presence or addition of one or more other elements or combinations thereof.

[0025] It should be noted that in the description of this invention, the orientations or positional relationships indicated by terms are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0027] Figure 1-6 An implementation of a closed computer host dust removal device according to the present invention is shown, including: a dust removal operation box 1, an air pump 2, an air jet unit 3, and a dust collection assembly 4. The dust removal operation box 1 is closed and has a door 13. The output end of the air pump 2 is connected to the air jet unit 3. The dust collection assembly 4 is connected to the dust removal operation box 1. The dust removal operation box 1 is provided with a rotating disk 11 and a motor I. The motor I drives the rotating disk 11 to rotate. The air jet unit 3 includes: a lifting assembly 31, a slider 32, and a plurality of air nozzles 33. The lifting assembly 31 is fixed inside the dust removal operation box 1; The slider 32 is connected to the lifting end of the lifting assembly 31, and the slider 32 is arranged horizontally and has a ventilation passage. The air nozzle 33 is connected to the ventilation passage, and the air nozzles 33 are evenly distributed along the extension direction of the slider 32; The ventilation passage is connected to the air pump 2 via a hose.

[0028] By setting up multiple horizontally arranged air nozzles 33 and lifting them with the lifting component 31, targeted dust removal can be carried out on the computer host, especially the side panel removal surface, avoiding the phenomenon that dust removal dead corners cannot be effectively removed due to other sides not being removed; by setting up a dust removal operation box 1 and a dust collection component 4, the dust is prevented from easily spreading and polluting the air, and the dust in the dust removal operation box 1 is cleaned in time to prevent secondary adhesion to the computer host, further ensuring the dust removal effect.

[0029] In practical applications, it also includes an integrated housing 6 that is integrally formed with the dust removal operation box 1, in which the air pump 2 and the dust collection assembly 4 are housed. The inner walls of the integrated housing 6 and the dust removal operation box 1 are provided with sound insulation layers; a rubber sealing strip is provided at the connection between the dust removal operation box 1 and the door 13, forming a double-layer seal, which ensures sound insulation during operation and effectively prevents dust leakage. Handles 62 are provided on both sides of the integrated housing 6 to facilitate the movement and transport of the device. The rotating disk 11 is provided with a locking block assembly 111 (such as...) for limiting and fixing the computer host. Figure 6(As shown). The dust removal operation box 1 is equipped with a pressure relief pipe connected to it, and a pressure relief valve is installed on it to ensure the balance of air pressure inside the dust removal operation box 1 during operation; and at least one end of the pressure relief pipe is equipped with a filter screen to prevent dust from overflowing and polluting the external environment.

[0030] The locking block assembly 111 includes: a fixing block 1111 and a moving block I 1112 fixing adjacent sides of the removal surface of the main unit side panel; a moving block II 1113 fixing the opposite side of the removal surface of the main unit side panel; and two screws 1114 driving the moving blocks I 1112 and II 1113 to move. The surfaces of the fixing blocks 1111, moving blocks I 1112, and moving blocks II 1113 that cooperate with the main unit are provided with an anti-slip layer to improve their reliability and prevent slippage. The rotating disk 11 is provided with two sliding grooves for the moving blocks I 1112 and II 1113 to move within, and the screws 1114 are disposed within the grooves along their extension direction. The screw 1114 is fixed at both ends to the slide groove. The end of the screw 1114 away from the rotating disk 11 is provided with a knob for the operator to hold and rotate. The fixing block 1111 and the moving block I 1112 are both configured as "L" shapes, which limit the removal surface of the main unit's side panel while fixing the two adjacent sides of the removal surface of the main unit's side panel. The moving block II 1113 is used to effectively limit the horizontal position of the main unit. The fixing block 1111 is set close to the edge of the rotating disk 11, so that when the main unit is fixed to the rotating disk 11, regardless of the size of the main unit, its side panel removal surface is close to the edge of the rotating disk 11, which improves the dust removal efficiency and effect.

[0031] The lifting assembly 31 includes: a bracket 311 fixed to the inner wall of the dust removal operation box 1, a motor II 312 fixed to one end of the bracket 311, a lead screw 313 that is driven and connected to the power output end of the motor II 312, a guide rod 314 that is parallel to the lead screw 313, and a lifting block 316 that is driven and connected to the lead screw 313. The lifting block 316 is provided with toothed holes and smooth holes that are respectively adapted to the lead screw 313 and the guide rod 314; Both ends of the lead screw 313 and the guide rod 314 are fixed to the bracket 311; The bracket 311 is also provided with a spiral bar 315 arranged parallel to the lead screw 313, and the lifting block 316 is provided with a dial 317 rotatably connected to the spiral bar 315. The dial 317 has a special-shaped hole in the center that is adapted to the spiral bar 315, and at least one tooth 3171 is provided on its outer side. The surface of the lifting block 316 that mates with the slider 32 is provided with a dovetail groove along its extension direction. The slider 32 is provided with a protrusion that matches the dovetail groove, so that the slider 32 can slide along the extension direction of the dovetail groove. The slider 32 is provided with a moving groove 3161 for avoiding the moving teeth 3171, and the center of the moving groove 3161 is provided with a stop block 3162 that is adapted to the moving teeth 3171. One end of the lifting block 316 is provided with a spring 318 connected to the slider 32 to give the slider 32 a force to move it to its original position.

[0032] During operation: The motor II 312 drives the lead screw 313, which in turn drives the lifting block 316 to rise or fall. During the rise or fall, the thread of the actuating disc 317 engages with the spiral strip 315 and rotates relative to it (its structure and movement are similar to a toy push-along saucer). The clockwise or counterclockwise rotating teeth 3171 abut against one side of the stop block 3162 of the actuating groove 3161, and push the slider 32 to move laterally a certain distance. When the teeth 3171 and the stop block 3162 rotate to separate, the spring 318 pulls the slider 32 back to the position before it was actuated, and repeats this cycle, causing the slider 32 to move laterally a small distance, creating a vibration-like phenomenon, which expands the coverage area of ​​the air nozzle 33 and further improves the dust removal efficiency and effect.

[0033] The motor II 312 rotates, driving the lead screw 313 to rotate, which in turn drives the lifting block 316 to move up and down along the lead screw 313, thus completing the lifting and lowering of the slider 32.

[0034] A hollow plate 12 is provided between the rotating disk 11 and the bottom plate of the dust removal operation box 1; The hollow plate 12 has multiple air intake holes on its top and a connecting hole on its side that communicates with the air intake end of the dust collection component 4. The diameter of the air intake holes is configured to be larger at the top and smaller at the bottom to enhance the dust collection effect and reduce the surface area of ​​the upper surface, making it easier to collect dust.

[0035] The hollow panel 12 can avoid the phenomenon of dust accumulation at the bottom caused by conventional side suction, which affects the dust removal quality and is conducive to dust suction and collection. A pull-out drawer can be provided inside the hollow panel 12 to facilitate the cleaning of large particles of impurities that have not been sucked up below the hollow panel 12.

[0036] The dust removal operation box 1 is equipped with a motor I that drives the rotating disk 11 to rotate.

[0037] The dust collection component 4 includes: a fan 41 and a dust collection chamber 42; The dust collection bin 42 is connected to the air intake end of the fan 41 and the dust removal operation box 1; A removable filter element 421 is provided at the connection between the top of the dust collection chamber 42 and the fan 41; The dust collection chamber 42 is equipped with a dust removal drawer at the bottom.

[0038] The fan 41 is configured as a vortex fan 41.

[0039] A powerful negative pressure suction is generated by a high-efficiency vortex fan 41, drawing dust-laden air into the dust collection chamber 42. The filter element 421 inside the dust collection chamber 42 effectively filters out fine particles. Through this series of designs, this sealed dust removal device can achieve efficient and safe dust removal and discharge clean air. After the device has been working for a period of time, the filter element 421 and the dust removal drawer can be cleaned to ensure the device can perform its dust removal work normally and efficiently. The integrated housing 6 has a side-opening dust removal port 61 corresponding to the dust removal drawer on its side, facilitating the cleaning of dust inside the dust collection chamber 42.

[0040] The integrated housing 6 is equipped with an inspection port, through which the filter element 421 can be replaced periodically, and the operating status of the high-pressure air pump 2 and the blower 41 can be checked. Also includes: Controller 5; The controller 5 is communicatively connected to the air pump 2, the dust collection assembly 4, the lifting assembly 31, and the motor I; the controller 5 is fixed to the integrated housing 6, and its control panel is equipped with control buttons 51 to control the start and stop operations of each component in the device; The dust removal operation box 1 is equipped with a PM10 sensor that communicates with the controller 5. This sensor detects and determines the dust concentration within the dust removal operation box 1, and the controller 5 determines whether to stop the dust removal operation based on the dust concentration. This achieves automated control while ensuring effective dust removal, automatically adapting to different computer hosts and matching different dust removal times to avoid ineffective work and improve work efficiency.

[0041] A method for dust removal from a sealed computer host includes: Step 1: Open the dust removal operation box 1, fix the computer host to be dusted onto the rotating disk 11 card block assembly 111, and make the side of the computer host with the side panel removed face the jet unit 3. Close the dust removal operation box 1 and start the air pump 2 and the dust collection assembly 4. Step 2: The lifting component 31 drives the horizontally arranged air nozzles 33 to perform one up-and-down reciprocating motion; Step 3: Rotate the rotating disk 11 in a fixed direction by 45°, 45°, 90°, 90°, 45°, and 45° angles in sequence, and repeat step 2 after each rotation until the rotating disk 11 returns to its initial position. Step 4: Controller 5 reads the PM10 sensor detection data; Step 5: When the PM10 index remains below 200 μg / m³ for 8 seconds 3 When the dust removal operation is completed, the device stops operating, and the dust removal work is finished; otherwise, repeat steps 2-5.

[0042] The pre-production and detection time of PM10 index detection data can be adjusted according to the actual situation; the speed of the lifting component 31 moving up and down can also be set and adjusted according to the actual situation.

[0043] In another example, the dust removal operation box 1 is equipped with a handheld dust blower, and the handheld dust blower is connected to the air pump 2 via a helical spring 318 duct. The side wall of the dust removal operation box 1 has a glove hole for easy access for the operator's hand, and an operating glove is fixedly and sealed to the edge of the glove hole. A soundproof cover 14 is hinged to the outside of the glove hole to seal it. The dust removal operation box 1 is equipped with a linear light to provide working lighting, and the box door 13 has a transparent observation window 131 for easy observation of the interior. After automatic dust removal is completed, the linear light can be turned on, and the operating glove can be inserted by opening the soundproof cover 14. The operator can then operate the handheld dust blower to clean the hard-to-clean parts inside the computer host at close range, further improving the dust removal effect. At the same time, the handheld dust blower can be used to clean the dust adhering to the inside of the dust removal operation box 1 to prevent dust accumulation and ensure the subsequent dust removal effect on the computer host.

[0044] The above solution is merely an illustration of a preferred example and is not limited thereto. When implementing this invention, appropriate substitutions and / or modifications can be made according to the user's needs.

[0045] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0046] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Other modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A closed-loop computer host dust removal device, comprising: A dust removal control box, an air pump, an air jet unit, and a dust collection assembly are provided. The dust removal control box is enclosed and has a door. The output end of the air pump is connected to the air jet unit. The dust collection assembly is connected to the dust removal control box. A rotating disk and a motor I are provided inside the dust removal control box. The motor I drives the rotating disk to rotate. The air jet unit includes a lifting assembly, a slider, and multiple air nozzles. The lifting assembly is fixed inside the dust removal operation box; The slider is connected to the lifting end of the lifting assembly, and the slider is arranged horizontally and has a ventilation passage. The air nozzles are connected to the ventilation passage and are evenly arranged along the extension direction of the slider. The ventilation passage is connected to the air pump via a hose.

2. The enclosed computer host dust removal device as described in claim 1, characterized in that, A hollow plate is provided between the rotary disk and the bottom plate of the dust removal operation box; The hollow plate has multiple air intake holes on the top and connecting holes on the side. The connecting hole is connected to the suction end of the dust collection component.

3. The enclosed computer host dust removal device as described in claim 1, characterized in that, The lifting assembly includes: motor II, lead screw, lifting block, spiral bar and actuating disc; The lead screw is connected to the power output end of motor II; The lifting block is connected to the lead screw drive; The spiral bar is arranged parallel to the lead screw; The center of the dial is provided with a special-shaped hole that matches the spiral strip, so that the dial and the spiral strip are rotatably connected. The actuating disc is rotatably fixed to the lifting block, and at least one actuating tooth is provided on its outer side; The surface of the lifting block that mates with the slider is provided with a dovetail groove along its extension direction, and the slider is provided with a protrusion that matches the dovetail groove, so that the lifting block and the slider can slide relative to each other; The slider is provided with a paving groove to avoid the paving teeth, and the center of the paving groove is provided with a stop block that matches the paving teeth, so that the slider slides in the paving direction under the paving of the paving teeth. One end of the lifting block is equipped with a spring connected to the slider, so that the slider returns to the position before the prying teeth were moved.

4. The enclosed computer host dust removal device as described in claim 1, characterized in that, The dust collection assembly includes: a fan and a dust collection bin; The dust collection bin is connected to the air intake end of the fan and the dust removal operation box; A removable filter element is provided at the connection point between the top of the dust collection chamber and the fan; The dust collection chamber is equipped with a dust removal drawer at the bottom.

5. The enclosed computer host dust removal device as described in claim 1, characterized in that, Also includes: Controller; The controller is communicatively connected to the air pump, the dust collection assembly, the lifting assembly, and motor I; The dust removal control box is equipped with a PM10 sensor that communicates with the controller.

6. A method for dust removal from a closed computer host, characterized in that, include: Step 1: Open the dust removal control box, fix the computer host to be dusted onto the rotating disk clamping block assembly, and make the side of the computer host with the side panel removed face the jet unit. Close the dust removal control box and start the air pump and dust collection assembly. Step 2: The lifting assembly drives the horizontally arranged air nozzles to perform one up-and-down reciprocating motion; Step 3: Rotate the rotating disk sequentially by a predetermined angle in a fixed direction, and repeat Step 2 after each rotation until the rotating disk returns to its initial position; Step 4: The controller reads the PM10 sensor detection data; Step 5: When the PM10 index remains below the set value for a predetermined period of time, the device stops operating, completing this dust removal operation; otherwise, repeat steps 2-5.

7. The dust removal method for a closed computer host as described in claim 6, characterized in that, In step 3, the rotating disk rotates at angles of 45°, 45°, 90°, 90°, 45°, and 45° in sequence.

8. The method for dust removal from a closed computer host as described in claim 6, characterized in that, The scheduled time for reading the PM10 index in step 5 is 8 seconds.

9. The method for dust removal from a closed computer host as described in claim 6, characterized in that, In step 5, the PM10 index is set at 200 μg / m³. 3 .

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